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MWC 297 Data Reduction

MWC 297 Data Reduction. M. Benisty, F. Malbet (LAOG) S. Kraus (MPIfR). Initial conditions. Commissioning Data from COM1: No spectral calibration Initial bad pixel maps 2T data only 31ms and 107ms data set Amdlib v0.106 and Fourier software at MPIfR Spectral range: 2100-2230nm

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MWC 297 Data Reduction

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  1. MWC 297 Data Reduction M. Benisty, F. Malbet (LAOG) S. Kraus (MPIfR)

  2. Initial conditions • Commissioning Data from COM1: • No spectral calibration • Initial bad pixel maps • 2T data only • 31ms and 107ms data set • Amdlib v0.106 and Fourier software at MPIfR • Spectral range: 2100-2230nm • Two calibrators: HD152880 and HD177756

  3. (u,v) coverage

  4. Raw data

  5. Is the signal actual?

  6. Spectral shift

  7. SNR selection

  8. Example of selection process

  9. Raw visibilities

  10. Calibration of visibilities

  11. Time dependance of calibrated visibilities

  12. Calibrated spectral visibilities

  13. Fourier software (MPIfR)

  14. Selection effect on amdlib

  15. Absolute visibilities

  16. Published values • Vcont = 0.50+0.08 • Vline = 0.33±0.06 -0.05

  17. Data consistency

  18. Astrophysical interpretation in one slide

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